/Engine/Source/Runtime/Slate/Public/Widgets/SViewport.h
Called when motion is detected (controller or device) e.g. Someone tilts or shakes their controller.
virtual [FReply](API\Runtime\SlateCore\Input\FReply) OnMotionDetected ( const [FGeometry](API\Runtime\SlateCore\Layout\FGeometry) & MyGeometry, const [FMotionEvent](API\Runtime\SlateCore\Input\FMotionEvent) & InMotionEvent )